<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <span>出票系统</span>
      </div>
      <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">

        <div class="toggle-button" @click="toggleCollapse">|||</div>

        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.name}}</span>
            </template>
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.name}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-container>
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconsObj:{
        '101':'iconfont icon-user',
        '102':'iconfont icon-tijikongjian'
      },
      isCollapse:false,
      //被激活的链接地址
      activePath:''
    };
  },
  created() {
    this.getMenuList();
    this.activePath=window.sessionStorage.getItem('activePath');
  },
  methods: {
    loginOut() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    async getMenuList() {
      const { data: res } = await this.$http.get("/json/menu.json");
      if(res.meta.status!=200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    //点击按钮，切换菜单的折叠和展开
    toggleCollapse(){
       this.isCollapse= !this.isCollapse;
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath=activePath;
    }
  }
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 18px;
  > div {
    span {
      margin-left: 20px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.toggle-button{
  background-color: #4A5064;
  font-size:10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>